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A Novel Bioactive Ceramic Coating for Improved Fixation of Orthopedic Implant

Published online by Cambridge University Press:  31 January 2011

Ahmed El-Ghannam  and
Aniket .
Ahmed El-Ghannam
Affiliation:
arelgha@uncc.edu, University of North Carolina at Charlotte, Mechanical Engineering and Engineering Science, Charlotte, North Carolina, United States
Aniket .
Affiliation:
aniket@uncc.edu, University of North Carolina at Charlotte, Mechanical Engineering and Engineering Science, Charlotte, North Carolina, United States
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Abstract

Electrophoretic deposition (EPD) coating of medical grade Ti-6Al-4V substrate with a novel silica-calcium phosphate nano-composite (SCPC) in the particle size range 50 nm-5 μm has been described. The influence of EPD parameters and thermal treatment on the coating homogeneity, thickness and adhesion strength has been studied. SEM analyses showed that EPD carried out in 5% (w/v) SCPC/ethanol suspension at 50 V produced a homogeneous coating on passivated Ti alloy discs. Tensile tests carried out to evaluate the adhesion strength at the ceramic/metal interface showed that the SCPC coating layer developed adhesion strength of 47 ± 4 MPa with Ti alloy after thermal treatment at 800 °C for 1 hr. SEM – EDX analyses of the fracture surface revealed that the presence of SCPC layer on the surface of the Ti alloy indicating high interfacial stability. Upon immersion of the SCPC-coated Ti alloy substrate in PBS, a surface biological hydroxyapatite layer was deposited suggesting bone bonding ability. The successful coating of SCPC on the Ti-6Al-4V has the potential to stimulate rapid fixation and lower stress shielding by enhancing the bone bonding ability of the implant.

Keywords

biomaterialbonecoating
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1236: Symposium SS – Biosurfaces and Biointerfaces , 2009 , 1236-SS08-17
Copyright
Copyright © Materials Research Society 2010

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